Method of forming metal type tubes



' 1933- F. H. POEPPELMEIER 11,920,275

METHOD OF FORMING METAL TYPE TUBES Original Filed May 13, 1927 y l. ATTORNEY 'Patented Aug. 1, 1933 ar eerie METHOD OF FORD ENG REIETAL TYPE TUBES Frank H. Poeppelmeier, Dayton, Ohio, assignor,

by mesne assignments, to Set-(3Type Manufacturing Company, Cleveland, @hio, a Corporation of Delaware (iriginal application May 13, 1927, Serial No.

191,099. Divided and this application February 5, 1931. Serial No. 513,501

2 Claims.

This invention relates to new and useful improvements in the method of forming tubes from metal.

The application is a division of my application which resulted in United States Patent No. 1,762,- 835, granted June 10, 1930.

- it is the principal object of my invention to provide a method of economically and expeditiousiy forming from metal, tubes such as type tubes. This method contemplates, first shearing a strip of metal to the required length, with an ear formed on one end and a pinched-in or pronged portion at its otherend, and then-by three successive steps bending it to assume a form T-shaped type for passage therethrough.

In the accompanying drawing illustrating the means for carrying my method into effect, Figure 1 is a sectional view'taken through the feeding rolls, Figure 2 is a sectional View through the shearing rolls, Figure 3 is a sectional view taken through the second feeding rolls,

ure 4 is a sectional view taken through the first.

rying out my method of forming tubes from metal appears in the mentioned above United State Patent No. 1,762,835.

ticularly type tubes, will now be described.

A metal trip '78 from a roll (not shown) is di rested between the feed rolls l2 and 43, and by them is fed to the shearing rolls 33 and 35, the retaining disc 34 being shown attached to the roll 33.

Referring to Figure 8, it will be observed that there is provided in the periphery of the roll 33 V a recess into which is fitted a female die 85 and a stripper 86 resting-on a rubber cushion 87. In a recess in the periphery of the upper roll 35 there is fitted a male die 38 which is formed and located to co-act with the female die 85 to out the metal strip '78 into proper lengths, with an car 89 formed on one end of each strip and terminating at its other end in a pinched-in or pronged portion 90. (See Figure 2.)

The ear 89' may be bent up to close its respective end of the tube after the type have been inserted therein, while the pinched-in or pronged having a fiat back and channeled front to receiv My method for forming tubes, and more-parend 90 permits the side walls of the other end of the tube to be collapsed to prevent the type falling out of that end. The shearing action of the male die 83 acting against the female die, forms the ear on one end and the prongs on the other end of ea h type tube blankwhich they cut from the metal strip. (See Figure 8.)

The strip so sheared and formed by the rolls 33 and 35 is directed between the next rolls 9 and 18. The roll 9 has a grooved periphery 1Q which a wide annular projection 19 formed on the roll 18, is adapted to enter.

Afterpassing between these rolls, the strip is fed by them to the first formin rolls 48' and 50. The roll 48 has a grooved periphery 49 into which the metal strip is forced by a wide annular projection '51 on the roll 50. These rolls 4e and 59 form. each metal strip with a flat bottom. Q1 and two slightly upturned sides, 92, 92. (See Figure l.) 7

The roll 59 having a grooved periphery 60, and the isc 61, which next receive the partly formed strip, give to the latter the more. pronounced curvatue shown in Figure 5. The still partly formed metal strip then passes to the third forming'rolls 68 and '70. The periphery f the roll 68 is formed with two spaced flanges 59, 69 which enter a concaved periphery 71 on the roll 0 to crimp the curved sides of the tube 93 to its final shape, as shown in Figures 6 and '7.

Having described my invention, I claim:

1. The herein described method of forming a type tube from metal, which consists in first shearing a metal strip to the-length required, with an ear formed on one end and prongs at its other end, and then bending said strip to channel form.

2. The herein described method of forming a type tube from metal, which consists in first shearing a metal strip to the length required,

with an ear formed on one end and prongs at 

